Question

multiple choice 10 points
what nutritional deficiencies have we inherited from our fish vertebrate ancestors?
inability ot make omega-6 fatty acids
inability to make vitamin d
inability to make aromatic amino acids
inability to make polysaccharides
22 multiple choice 10 points
what type of fish is closest to the first amphibians?
ray-finned fish
lobe-finned fish
sharks and skates (chondrichthyes)
agnatha (jawless fish)
23 multiple choice 10 points
an epithelial membrane comes from

Explanation:

Question 1 (Nutritional Deficiencies from Fish Ancestors)

To solve this, we analyze each option:

• Omega - 6 fatty acids: Humans can make some, but the key here is about inherited deficiencies from fish ancestors. Aromatic amino acids: Humans (and vertebrates) can't synthesize them, and this inability is inherited from our fish vertebrate ancestors. Vitamin D: Humans can synthesize it with sunlight. Polysaccharides: Not a nutritional deficiency related to fish ancestry in this context.

Lobe - finned fish (like coelacanths) have limb - like fins with bones, which are thought to be the evolutionary link to the first amphibians that moved to land. Ray - finned fish, sharks, and jawless fish don't have the same evolutionary connection to amphibians as lobe - finned fish.

Answer:

Inability to make aromatic amino acids

Question 2 (Fish Closest to First Amphibians)